/**
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

var EventEmitter = require('events').EventEmitter;
var events = new EventEmitter();

var should = require("should");

var fs = require("fs");
var path = require("path");

var library = require("../../../../red/runtime/nodes/library")

describe("library api", function() {
    it('returns null list when no modules have been registered', function() {
        library.init({events:events});
        should.not.exist(library.getExampleFlows());
    });
    it('returns null path when module is not known', function() {
        library.init({events:events});
        should.not.exist(library.getExampleFlowPath('foo','bar'));
    });

    it('returns a valid example path', function(done) {
        library.init({events:events});
        events.emit('node-examples-dir',{
            name: "test-module",
            path: path.resolve(__dirname+'/../../../resources/examples')
        });
        setTimeout(function() {
            try {
                var flows = library.getExampleFlows();
                flows.should.deepEqual({"d":{"test-module":{"f":["one"]}}});

                var examplePath = library.getExampleFlowPath('test-module','one');
                examplePath.should.eql(path.resolve(__dirname+'/../../../resources/examples/one.json'))


                events.emit('node-module-uninstalled', 'test-module');

                setTimeout(function() {
                    try {
                        should.not.exist(library.getExampleFlows());
                        should.not.exist(library.getExampleFlowPath('test-module','one'));
                        done();
                    } catch(err) {
                        done(err);
                    }
                },20);
            }catch(err) {
                done(err);
            }
        },20);

    })
});
